Triethylamine → HCID 59560293, compound

Participants

Reaction Steps

A mixture of 4-hydroxy-2,2-dimethyl-2,3-dihydrobenzofuran-6-carboxy-lic acid methyl ester (3e) (1 g, 0.0045 mol), 3,5-difluorophenylboronic acid (1.07 g, 0.0068 mol), Cu(OAc)2 (0.9 g, 0.005 mol), freshly activated 4 Å molecular sieves (4 g) and Et3N (4 mL) in CH2Cl2 (25 mL) was stirred at room temperature under N2 for 48 hrs. The mixture was filtered through Celite and the filter cake was washed with CH2Cl2. The filtrate was concentrated to give a dark liquid. The crude liquid was purified by column chromatography eluting with EtOAc/petroleum ether (1/5) to give the title compound (0.4 g, 26.6%) as a colorless oil. 1H NMR (400 MHz, CDCl3): δ 7.18 (s, 1H), δ 7.14 (s, 1H), 6.47(m, 1H), δ 6.36 (dd, 2H), 3.81 (s, 3H), 2.83 (s, 2H), 1.41 (s, 6H).

Provenance & Evidence